1. Manuals
  2. Brands
  3. Abstrakt Instruments Manuals
  4. Synthesizer
  5. VS-1
  6. Assembly manual

Abstrakt Instruments VS-1 Assembly Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
VS-1 ASSEMBLY GUIDE - Draft 0.83 Feb 7 2024

SECTION 1 - PCB Assembly

Current BOM & Schematic Revisions
DIY BOM - v1.04
Voice Cards - RevA
Voice Motherboard - RevA2
Output Board - RevA2
Panelboard - RevA
Mainboard - RevA
DAC Board - RevA
I/O Board - RevA
DATE
ECO #
BOARD/DOCS AFFECTED
Output Board
2-Feb-2024
VS1-1
Schematic Sheet 1
Voice Mobo
2-Feb-2024
VS1-2
Schematic Sheet 5
Tools
Soldering iron
Desoldering station or pump
Solder: 0.025"-0.032" (0.6mm-0.8mm) Sn/Pb w/ standard flux or no clean preferred - only use lead-free solder if you have the
proper tools and skills
Lead forming tool
recommended
PCB Details
The VS-1 contains (7) different PCB Assemblies. Two of the boards (IO Board & DAC Board) are already assembled - leaving (5)
remaining board designs to build. In total there are (12) individual boards to build:
(8) Voice Cards
(1) Voice Motherboard
(1) Mainboard
(1) Panelboard
(1) Output Board
Conventions & Recommendations
Components refer to the actual parts that will be installed on the PCB's.
Designators refers to the name give to each component on the PCB to differentiate them.
Part Numbers shown in the documents are the actual part number we used for all of our parts kits. For passive components
such as resistors & capacitors it is not necessary to use the same exact part number. However, the parameters should be the
same.
VS-1 ENGINEERING CHANGE ORDERS
DESCRIPTION
Change R1 & R31 to 1k 1%
Change C5 & C30 to 150pF C0G
Change R22 - R29 to 470k 1%
REASON FOR CHANGE
Allows for more adjustment over
delay times. Chorus has two modes,
fast and slow. Initially, fast mode was
Juno mode and slow mode was
Dimension D mode. During demo &
testing of production units it was
found that calibrating slow mode as
Juno mode and fast mode as a new
(faster) mode gives some pleasing
(almost flanging) effects. The change
gives the option to calibrate for
either options.
Decrease voice bleed of passively
summed voice outputs.
EFFECTIVE
All Production
All Production

Advertisement

Table of Contents
loading

Related Manuals for Abstrakt Instruments VS-1

Summary of Contents for Abstrakt Instruments VS-1

  • Page 1: Section 1 - Pcb Assembly

     PCB Details The VS-1 contains (7) different PCB Assemblies. Two of the boards (IO Board & DAC Board) are already assembled - leaving (5) remaining board designs to build. In total there are (12) individual boards to build: (8) Voice Cards...
  • Page 2  help greatly when you get to testing the VS-1 - as most of the active components will not be placed at first. It is not necessary to install transistor sockets but there is enough room if desired. IC sockets may sometimes tarnish over time, so there’s no guarantee that they will be making good contact in 25 years time.
  • Page 3 Image 2: Selected net is highlighted in both schematic and PCB views When you are ready to begin populating a board click on one of the board assembly links in the VS-1 DIY section of the website. The page will open directly in your browser. To begin assembly click on the Assembly tab at the bottom left of of the page (see image 3).
  • Page 4 Image 4: The show info tab allows you to see more info for the selected component Please note: When using a phone the windows get crammed and it can be difficult to pan and zoom to see all the information easily.

  • Page 5: Section 2 - Pcb-Specific Notes & Modifications Not Stated In Altium Assembly

    Type 125 carving bit to shave off some thickness on the connector pin until it fits through the hole. We have included (4) extra 8-position connectors with every kit (Molex part # 09-48-1084). (VS-1 Standard Kits shipped in December 2023 do not have the extra 4pcs of Molex part # 09-48-1084 - they will be shipped along with the 2nd package).
  • Page 6 2. Install ENC1 so that it sits 1.5mm (1/16”) away from the PCB. This will allow the encoder bushing to be mounted to the front panel. When installed at this height the legs will be about flush with the bottom of the PCB. 3.

  • Page 7: Section 3 - Final Assembly

    SECTION 3 - Final Assembly Note: Do not forget to install lock washers where described during enclosure assembly. The enclosure is made up of 6 individual metal panels. The lock washers are used electrically connect each panel so that the enclosure forms a metal cage around the electronics inside.This is to create a good chassis ground and is necessary to meet regulatory agency requirements for safety &...
  • Page 8 STEP 4: INSTALL FAN & INPUT JACK TO REAR PANEL https://www.youtube.com/watch?v=pcXoduPB_ns (1) Fan (60mm x 60mm x 15mm) (1) Fan Guard (Bag 9) (4) 8-32 x 1” Pan Head Black Oxide Screw (purple) (Bag 1) (4) 8-32 Lock Nut (green) (Bag 2) (1) IEC Jack (Bag 9) (2) 1.0A or 1.5A fuse (fuse is already installed! extra fuse also installed in holder) (2) 6-32 x 3/8”...
  • Page 9 It should be mounted so that the top of the PSU enclosure is about 16mm (5/8”) below the top of the side panel. The 8 position connector should face towards the front of the VS-1. The ribbon cable clip (red) (Bag 9) will eventually be mounted on top of the PSU enclosure - place it on top temporarily to make sure the PSU is not mounted too high.
  • Page 10 STEP 7: ASSEMBLE POWER SWITCH & POWER SUPPLY CONNECTORS https://youtu.be/SPTx5pW1WJ0 (1) 3 position JST connector (Bag 9) (2) 8 position JST connector (Bag 9) (1) 12” wire w/ pre-crimped JST terminals on one side & 4.8mm quick connect terminal on the other side (Bag 7) (1) 11”...
  • Page 11 STEP 8 : PLUG IN POWER CONNECTORS https://youtu.be/CBu8HOL9i-o The long cable assembly connects between the power entry module, PSU module, and power switch. The wire colors have been changed below to make it easier to see the connections. Make sure to connect the quick connect tabs to the correct positions. The Line and Neutral connections are noted on both the PSU module and the power entry module, and are also shown in the correct orientation in the images below.
  • Page 12 Next, solder the yellow chassis ground cable into the bottom ground tab of power entry module and connect the ring terminal where shown. Note: the image shows a 187”/4.8mm quick connect installed as an option if you have the crimp tool and connector available and don’t want to direct-solder.
  • Page 13 STEP 9: CHECK & INSTALL FAN CONNECTOR https://youtu.be/0mD5xvKeexk The 5V DC fan is a 3-wire version. The yellow wire is the tachometer connection. The recommended fan listed in the BOM has a 3- pin molex header already in place. PLEASE CHECK the wiring to make sure it is correct and matches the pictures below - we have received some fans with the incorrect wiring! If you use a fan without a connector you will need to solder the wires directly to the voice mobo or install molex crimp terminals.
  • Page 14 STEP 11: CALIBRATE PSU OUTPUTS https://youtu.be/wAF4sgTHIrc WARNING! Be extremely careful when working with line voltage. 1) Make sure the power switch (rocker switch) is on the off position. 2) Plug in the power cable. 3) Turn on the power switch. 4) Probe the +18.5V raw output from the PSU.

  • Page 15: Step 12: Install I/O Board

    STEP 12: INSTALL I/O BOARD https://youtu.be/blmTi7bXP-Q (2) M3 x 6mm Pan Head Black Oxide Screw (Bag 1) STEP 13: INSTALL OUTPUT BOARD https://youtu.be/G8QNOahc76Q (4) M3 x 24mm Female Brass Standoff (green) (Bag 3) (4) M3 x 6mm Narrow Pan Head Black Oxide Screw (pink) (Bag 1) (4) M3 x 6mm Pan Head Black Oxide Screw (green) (Bag 1) (1) 50mm 16-Position Ribbon Cable (Bag 8) (1) 50mm 20-Position Ribbon Cable (Bag 8)
  • Page 16 Connect the CN16 & CN17 ribbon cables, power on the unit, and re-test the +/-15V analog supply voltages to make sure there are no obvious faults w/ the output board connected. If desired, you can first test the output board without the IC’s installed. STEP 14: INSTALL OLED TO PANELBOARD https://youtu.be/fIApntb4T8E (4) #4 x 9/32”...
  • Page 17 Note: The 82-degree flat-head screws were specifically chosen to work with the recommended OLED. If using a different OLED a different screw type may be required. STEP 15: INSTALL OLED BEZEL & FRONT PANEL TEST FIT https://youtu.be/hrL6ExcvNl0 (1pcs) 3M GPT-020F (blue) (Bag 25) Cut two strips from the included 3M double-sided transfer tape and attach to the back of the front panel.

  • Page 18: Top View

    STEP 16: INSTALL MAINBOARD, PANELBOARD & DAC BOARD PCB STACK https://youtu.be/2RN0ImtVHyM Part 1: Install Standoffs & L-bracket to Panelboard (11) M3 x 7mm Male-Female Brass Standoff (green) (Bag 3) (1) M3 x 8mm Female Aluminum Standoff (blue) (Bag 3) (1) L-bracket (yellow) (Bag 2) (7) M3 Serrated Lock Nut (red) (Bag 2) (3) M3 Standard Nut (orange) (Bag 2) TOP VIEW...
  • Page 19 Next, secure the panel with the panel nuts. You may want to install only a few of the panel nuts at this time until the testing is complete. We don’t use the fender washers for our retail VS-1’s, but they...
  • Page 20 STEP 19: TEST POWER TO THE OUTPUT BOARD https://youtu.be/B2c_dBbDODc (1) 50mm 20-Position Ribbon Cable (Bag 8) (1) 50mm 16-Position Ribbon Cable (Bag 8) Power off the VS-1  Plug in CN17 & CN17  Power on the VS-1 ...
  • Page 21 STEP 20: INSTALL VOICE CARDS 1A TROUGH 4A https://youtu.be/RPQ5Z8sHOFY Each voice card is powered directly from the ~+18.5V/-18V power from the main PSU and have their own +/-15V regulators on- board. Power off the VS-1  Install Voice Card 1A ...

  • Page 22: Step 22: Install Operating System

    STEP 23: TEST MODE Once the operating system is successfully installed test mode will allow you to test the interface to make sure the VS-1 is working properly at a basic level. Press the SHIFT key while powering on the unit.

Table of Contents